Cavagna Automatic Changeover Regulator - Kit Includes Mounting Bracket And Plastic Cap Cover Automatically switches from empty service cylinder to full reserve cylinder, ensuring continuous gas flow to appliances. Highly visible full/empty indicator signals need for refill. Built-in back check valve allows empty cylinder removal and refill as reserve cylinder remains operational. Adjustable pressure setting. 160,000 BTU/hour - InLet's: (2) 1/4" inverted flare, Outlet: 3/8" Female Pipe Thread. Kit includes mounting bracket for easy installation, and plastic cap cover required by RVIA. UL listed: SAFETY FEATURES: Built-In Back Check Valve: allows empty cylinder removal and refill as reserve cylinder remains operational. Excess Flow Device: ensures protection with all hose connections. Limits gas flow in the event of hose rupture or accidental disconnection. Overpressure Protection Device: Limits environmental propane release in case of regulator malfunction to a value less than 2 psi, significantly lower than that mandated by UL standard 144. Box.